Improvement in gearing for operating drills



AgBLATcHw Improvement n-Gearngs for Operating Drills. No. 114,754tPafentedMay16,1s71.

dialin Siria AMBRCSE ABLATCHLY, AOF SAN FRANCISCO, CALFCRNIA.

Letters Patent No, 114,754, dated May 16, 1871.

IMPROVEMENT IN GEARING EOR OPERATING DRILLS.

The Schedule referred to in these Letters Patent and making part of thesame.

T0 all whom 'it may concern:

Be it known vthat I, Airnnosn BLATCHLY, of the city and county of SanFrancisco, State of California, have invented an Improvement inRock-Drills and I do hereby declare thefollowing description andaccompanying drawing are sufficient to enable any person skilled in theart or science to which it most nearly appertains to make and use mysaid invention or improvement without further invention or experiment.

This invention relates to an improvement in devices fer applying powerto rock-drilling machines, whereby power at the surface (as the hoistingand pumping-engine of a mine) can be applied to operate any number ofdrills on any level or in any shaft o chamber in the mine.

Previous to my invention power-drills in mines or tunnels were operatedby steam or compressed air applied to engines directly attached to thedrillingmachines and forming a part of them.

These machines were very expensive and complicated, and could not be runat high rates of speed, owing to the jar and recoil of the drills,which, with the moisture of the mine and sand formed in drilling, soonrendered them inoperative.

v Their large size and great weight precluded their .use i'n a confinedspace like the gallery of an ordinary mine, while their multiplicity ofparts and delicacy of construction required a skillful engineer tooperate them and an experienced machinist to repair them.

Now, my invention remedies this diiculty by dispensing with the engineattached tothe drilling-machine, enabling me to run my machine at a muchhigher rate of speed and to get the same force of blow with much lessweight of drill; and the same p enetra- Y tion in the rock is effectedwith much less wear of the drill-point when moving rapidly than whenmoving more slowly.

This high speed enables me to construct the drilling-machines so smalland simple that they can be operated in any gallery which a man canenter, and by a miner of ordinary skill. The comparatively small numberof parts whic compose them renders them greatly less liable to get outof order, and the cost of repairing is reduced in the same ratio. l v

Also, inthe `peculiar construction of a set Aof slidbars, operatingincombination with pulleys, gears, shafts, and universal joints, topartially adjust the `machine.

Also, in the construction of a cross-shaft operating with a similarcombination to perfect the adjustment so that the machine can beoperated in all Apositions and at any angle.

Also, in the arrangement of shafts, gears, and pulleys, so that anyrequired numberv of drills can be operated simultaneously in differentparts of the same mine from one engine or source of power.

ST0 enable others skilled in the art to make and use my invention, Iwill proceed toA describe its construction and operation. 'j v v Figurel represents a section of a' mine with my invention ready' foroperation. 4

Figure 2 represents an enlarged view o f the set of sliding bars,shafts, universal joints, cross-shaft, and

gears. p

Similar letters of reference represent corresponding parts.

X is a fast pulley, to which motion is imparted by any convenient power.p If gear is preferred it may be used in lieu of this pulley.

D is a shaft that extends into the mine at any desired angle, and bycouplings may be extended t'o any desired length.

By means of a bevel-gear power may be taken from this shaft at anypoint, as at E, transmitting power to the shaft G, which may be set atany required angle and extended to the desired distance.

Otherr shafts, as H I J K, may be similarly connected so as to operateany desired number of drilling-machines simultaneously.

Clutches may be arranged so that each drill may be disconnected at will.

In order to set the machine at any angle or to ad'- just it to anyposition, or to move it forward when in operation without disconnection,I construct the following devices:

At the end of the shaft G is a universaljoint, a, which forms theconnection between the shaft Cr and the socket-shaft or bar L.- y.

Within this shaft (the mouth of the socket being of an angular form)slides the angularbar M, of any convenient length.

The bar and opening being of angular' or other equivalent form, anyrotary motion of the shaft G is transmitted to the bar M.

At the other end of the bar M is another universal joint, C, whichconnects with the driving-shaft e of" line with the shaft G or at anyangle with it not greater than fifty degrees.

4Coupling the bar M by thenniversal jointO to the gross-shaft N, (whichis set at right .angles or other convenient angle to the main ordriving-shaft e,) the drill can be operated at any angle with the shaitG greater than forty-ve degrees, and `by these two operations the drillcan be operated at any angle and in any position with perfect ease.

I claim- The combination and arrangement of the pulley X, shaft D, gearsE and F, shaft G, coupling and universal joint a, socket-shaft L,angular bar M, wit universal joint c, shaft e, gear d, and cross-shaftN,

the whole constructed to operate as described, for the

